social jet lag

Etymology
Coined by chronobiologist and later popularised via his 2012 book Internal Time: Chronotypes, Social Jet Lag, and Why You're So Tired.

Noun

 * 1) The difference in the timing of a person's sleep period (measured as average midpoint of his/her sleep period) between workdays and rest days.
 * 2) * 2015 December, Siramon Reutrakul, Kristen L. Knutson, Consequences of Circadian Disruption on Cardiometabolic Health, Phyllis C. Zee (editor), Science of Circadian Rhythms, Sleep Medicine Clinics, Volume 10, Number 4,, page 460,
 * For example, going to bed at a different time on work or school days than on free days or weekends can lead to social jet lag, which may also be associated with cardiometabolic function.
 * For example, going to bed at a different time on work or school days than on free days or weekends can lead to social jet lag, which may also be associated with cardiometabolic function.